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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="range.reference.extending.method_1"></a><a class="link" href="method_1.html" title="Method 1: provide member functions and nested types"> Method 1: provide |
| member functions and nested types</a> |
| </h4></div></div></div> |
| <p> |
| This procedure assumes that you have control over the types that should |
| be made conformant to a Range concept. If not, see <a class="link" href="method_2.html" title="Method 2: provide free-standing functions and specialize metafunctions">method |
| 2</a>. |
| </p> |
| <p> |
| The primary templates in this library are implemented such that standard |
| containers will work automatically and so will <a href="../../../../../../../libs/array/index.html" target="_top">boost::array</a>. |
| Below is given an overview of which member functions and member types a |
| class must specify to be useable as a certain Range concept. |
| </p> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Member function |
| </p> |
| </th> |
| <th> |
| <p> |
| Related concept |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">begin</span><span class="special">()</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <a class="link" href="../../concepts/single_pass_range.html" title="Single Pass Range">Single Pass |
| Range</a> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">end</span><span class="special">()</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <a class="link" href="../../concepts/single_pass_range.html" title="Single Pass Range">Single Pass |
| Range</a> |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p> |
| Notice that <code class="computeroutput"><span class="identifier">rbegin</span><span class="special">()</span></code> |
| and <code class="computeroutput"><span class="identifier">rend</span><span class="special">()</span></code> |
| member functions are not needed even though the container can support bidirectional |
| iteration. |
| </p> |
| <p> |
| The required member types are: |
| </p> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Member type |
| </p> |
| </th> |
| <th> |
| <p> |
| Related concept |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">iterator</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <a class="link" href="../../concepts/single_pass_range.html" title="Single Pass Range">Single Pass |
| Range</a> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">const_iterator</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <a class="link" href="../../concepts/single_pass_range.html" title="Single Pass Range">Single Pass |
| Range</a> |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p> |
| Again one should notice that member types <code class="computeroutput"><span class="identifier">reverse_iterator</span></code> |
| and <code class="computeroutput"><span class="identifier">const_reverse_iterator</span></code> |
| are not needed. |
| </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2003 -2010 Thorsten Ottosen, Neil Groves<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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